Can one battery ruin voltage if the rest are good??

I just bought a 250amp alt to help with voltage drop with about 4krms.

Ive got a bluetop underhood battery, 250 amp alt, and 2 NSB90 (massive) batteries in the back. My voltage still drops to 12.7ish on full tilt while driving, not much more than before.....

My blue top is like 2 years old, and my NSB's are brand new. Could the blue top be holding me back?? i dont get what the freakin problem is

Im sure I should have voltage higher than this

 
Yes, voltage issues are resistance issues. Any link in the chain that produces excess resistance will hurt over all system voltage. It is not recommended to hook new and old batts together unless they are separated by an isolator, for this reason.

 
Anyway to test?? The optima is new enough to me to not be bad yet. But it is just a blue top.... dont know if it would strain my voltage this baddass

Dont know if its worth upgrading or not

I can pickup a kinetic 2400 for fairly cheap, but dont know if there good main bateries or not

 
This dude probably used the cash he scammed me out of three weeks ago if he even has this set-up. QuantumAudio is the same as boostnbeer. His name is Kevin StJohn. Real f'ing prick, don't fall for his crap like I did. Kevin... **** you!

 
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